Lock with several tumblers



Jan. 5 1926.

M. FUBER LOCK WITH SEVERAL TUMBLERS Filed May 26, 1923 i F6403! Jill-r1zz I I:- L%

(plan-.

Patented Jan. 5, 1926.

UNITED STATES MAXIMILIAN Ethane, or LUBECK, GERMANY.

LOCK WITH SEVERAL TUIVIBLERS.

I Application filed May 26, 1923. Serial No. 641,652.

To all whom it may concern Be it known that I, MAXIMILIAN FiiBER, acitizen of the German Republic, residing at 24 Schutzenstrasse, Lubeck,Germany, have invented certain new and useful Improvements in Locks withSeveral Tumblers, for which I have filed an application for patent inGermany on the 16th of November, 1922, and of which the following is aspecification.

This invention relates to a lock with several tumblers submitted to theaction of a common tumbler spring. The novelty consists in that thelowermost tumbler is oscillable around a fixed pivot pin, the othertumblers being each pivotally connected with the next lower tumbler, thespring acting upon the uppermost tumbler. The

useful lever arm of the several tumblers be comes longer in accordancewith the decrease of the direct power transmission exerted upon thetumblers by the spring so that the power of the spring is uniformlydistributed on all tumblers. I

In order that the invention may be clearly understood, I shallhereinafter proceed to describe the same with reference to the form ofconstruction shown by way of example on the accompanying drawing,wherein:

Fig. 1 is a rear elevation of the improved 3v lock.

Fig. 2 is an end view of the same, and

Fig. 3 is a horizontal cross section.

The bolt .a is movably mounted on bolts 6 and a fixed on the key plateIt and guided in the end plate 72. of the casing. The tumblers (l, d, darranged at the side of the bolt a may be of any desired number and theyare in dependent relation to the steps of the key bit. On bolt a thetumbler pin is fixed which projects into the stepped windows d of thetumblers. The lowermost tumbler d is pivotally mounted on the bolt 6,the tumbler d is pivotally mounted on the pin 0 fixed on the tumbler dand the tumbler (Z is pivotally mounted on the pin 7 fixed on tumbler d,any additional tumblers being pivotally arranged on the preceedingtumbler. Each upper tumbler is pivotally connected with the next lowertumbler, the lowermost tumbler being however ivotally mounted on a fixedpivot pin.

The tumbler spring 9, which may be of any convenient kind and which iscommon to all the tumblers, is attached with one end at a" to theuppermost tumbler d and with the other end to a'hook 11 of the key platek. r

The spring 9 bears against the hook z and exerts a direct pressure onthe tumbler 03* so that the edge of aperture d of this tumbler isstrongly pressed on the pin 70. As

the tumbler d is connected with the tumv bler (Z and this tumbler isagain connected with the tumbler d the pressure of spring g is alsotransferred to the tumblers d and d.

The power of spring of the tumbler spring 9 1S uniformly distributedupon all tumblers.

By the different shapes of the key bit the several tumblers are raisedfor different heights in opposition to the pressure of the spring g. Thepoint at which the spring 9 presses on the tumbler (Z is situated at i,slightly in front of pin f around which the tumbler d pivots. As thetumbler d on which the action of spring 9 is directly exerted the usefullever arm w from the point of action 2" of the spring 9 to the fulcrum fis only very short, the useful lever arm y of tumbler d, and the usefullever arm .2 of tumbler (2 being longer so that the more the directpower transmission of the spring 9 upon the tumblers decreases theuseful lever arm becomes the longer and a uniform action of the springin all the tumblers is ensured.

The tumblers can be very thin so that a great number of tumblers maybesuperposed and connected with one another without undue increase ofthe width of the look.

I claim 1. A look with several tumblers controlled by a common springcomprising in combination a key plate, a pivot pin fixed on said keyplate at the inner end of the same, a

guide pin fixed on said key plate at about the middle of the same, ahook fixed on said key plate above said guide pin, a bolt guided on saidpins, a set of tumblers on said bolt the lowermost of said tumblersbeing pivotally mounted at its inner end on said pivot pin and having inproximity to said pivot pin a pivot pin for the next following tumblereach following tumbler having a pivot pin for the succeeding tumbler,and a tumbler spring attached with one end to the uppermost tumbler andwith the other end to said hook of the key plate.

2. A look with several tumblers controlled by a common spring comprisingin combination a key plate, a pivot pin fixed on said key plate at theinner end of the same, a guide pin fixed on said key plate at about themiddle of the same, a hook fixed on said key plate above said guide pin,a bolt guided on said pins, a set of tumblers on said bolt the lowermostof said tumblers being pivotally mounted at its inner end on said pivotpin and having in proximity to said pivot pin a pivot pin for the nextfollowing tumbler each following tumbler having a pivot pin for thesucceeding tumbler, and a tumbler spring attached with one end to theuppermost tumbler and with the other end to said hook of the key plate,the useful lever arm of each tumbler becoming longer 15 the power of thespring is uniformly dis- 20 tributed uponall the tumblers.

In testimony whereof I affiX my signature.

MAXIMILIAN FUBER.

